Low-noise centrifugal explosion-proof fan

Abstract

The utility model provides a low noise centrifugal explosion -proof fan relates to detector technical field, including fan welding frame, the rear end of fan welding frame is installed with centrifugal fan, the front end of fan welding frame is installed with silencer, is installed in the silencer with filter screen. Low noise centrifugal explosion -proof fan air outlet flange is installed in the generator air inlet, utilizes centrifugal fan air -blowing principle, will external low temperature air through centrifugal fan and send into the generator inside. The external low temperature air needs to pass through filter screen first, effectively isolates the sundries in external environment, then passes through the function of silencer, reduces the noise that air produces because of high -speed flow impact fan welding frame. Through the continuous operation of this low noise centrifugal explosion -proof fan, the high temperature air that wind driven generator inside operation produces will be sent out generator with the low temperature air that is constantly discharged, reaches the purpose that cools the generator, lets the generator be in an ideal operating environment.

Description

Technical Field

[0001] This utility model relates to the technical field of low-noise centrifugal explosion-proof fans for wind turbines, and in particular to a low-noise centrifugal explosion-proof fan. Background Technology

[0002] Generally, wind turbines are cooled using either backpack-style air-to-air cooling or external air-to-water cooling. Both methods ensure the operation of the wind turbine by using a primary cooling medium (a gas or liquid medium with a temperature lower than a certain component of the turbine, which comes into contact with that component and carries away its released heat) and a secondary cooling medium (a gas or liquid medium with a temperature lower than the primary cooling medium, which carries away the heat released by the primary cooling medium through the turbine's exterior or a cooler). After heat exchange through the cooling device, the internal components of the turbine are cooled.

[0003] Currently, existing technologies for low-noise centrifugal explosion-proof fans, including backpack-style air-to-air cooling and external air-to-water cooling, suffer from limited secondary cooling efficiency, resulting in limited heat dissipation, poor stability, and high cost for wind turbines. Utility Model Content

[0004] The purpose of this invention is to solve the problems of limited heat dissipation, poor stability, and high cost of wind turbines caused by the limited efficiency of secondary cooling in existing backpack-type air-to-air cooling and external air-to-water cooling methods. Therefore, a low-noise centrifugal explosion-proof fan is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a low-noise centrifugal explosion-proof fan, comprising a fan welding frame, a centrifugal fan installed at the rear end of the fan welding frame, a silencer installed at the front end of the fan welding frame, and a filter screen installed inside the silencer.

[0006] Preferably, a connecting plate is fixed to the front end of the fan welding frame, and the connecting plate is installed with the silencer by locking bolts.

[0007] Preferably, the top of the filter screen is fixed with multiple latches, which are installed with the muffler by bolts.

[0008] Preferably, a ring of mounting holes is provided at the bottom end of the fan welding frame.

[0009] Preferably, the outer side of the locking bolt is provided with silicone sealant.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this invention, the outlet flange of the low-noise centrifugal explosion-proof fan is installed at the air inlet of the generator. Utilizing the centrifugal fan's blowing principle, it delivers low-temperature external air into the generator. The low-temperature external air first passes through a filter to effectively isolate impurities from the external environment, and then passes through a silencer to reduce the noise generated by the high-speed airflow impacting the fan's welded frame. Through the continuous operation of this low-noise centrifugal explosion-proof fan, the high-temperature air generated inside the wind turbine is continuously discharged by the incoming low-temperature air, achieving the purpose of cooling the generator and keeping it in an ideal operating environment. This ensures power generation efficiency, reduces losses, and extends the generator's service life. The filter, silencer, centrifugal fan, and fan welded frame are all detachable, facilitating assembly and use in various confined spaces and allowing for easy replacement and maintenance. All bolts used for fastening are made of white zinc-plated material, grade 8.8, and exposed bolts are sealed with silicone sealant. The overall corrosion resistance of the explosion-proof fan meets the C3 level requirements of ISO12944-2-1998, satisfying customer requirements. Direct air cooling of the generator provides better cooling effect and eliminates the need for secondary cooling. Attached Figure Description

[0011] Figure 1 A rear view of a low-noise centrifugal explosion-proof fan is provided for this utility model; Figure 2 A side view of a low-noise centrifugal explosion-proof fan is provided for this utility model; Figure 3 A front view of a low-noise centrifugal explosion-proof fan is provided for this utility model; Figure 4 A perspective view of a low-noise centrifugal explosion-proof fan is presented for this utility model.

[0012] Legend: 1. Fan welded frame; 2. Silencer; 3. Centrifugal fan; 4. Filter screen; 5. Connecting plate; 6. Locking bolt; 7. Locking buckle. Detailed Implementation

[0013] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0014] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0015] Example 1, as Figure 1-4As shown, this utility model provides a low-noise centrifugal explosion-proof fan, including a fan welding frame 1, a centrifugal fan 3 installed at the rear end of the fan welding frame 1, a silencer 2 installed at the front end of the fan welding frame 1, and a filter screen 4 installed inside the silencer 2.

[0016] The overall effect of Embodiment 1 is that the outlet flange of the low-noise centrifugal explosion-proof fan is installed at the air inlet of the generator. Utilizing the blowing principle of the centrifugal fan 3, low-temperature external air is sent into the generator through the centrifugal fan 3. The low-temperature external air must first pass through the filter screen 4 to effectively isolate impurities in the external environment, and then pass through the silencer 2 to reduce the noise generated by the high-speed airflow impacting the welded frame 1 of the fan. Through the continuous operation of this low-noise centrifugal explosion-proof fan, the high-temperature air generated inside the wind turbine is continuously discharged from the generator by the incoming low-temperature air, achieving the purpose of cooling the generator, keeping the generator in an ideal operating environment, ensuring power generation efficiency, reducing losses, and extending the generator's service life.

[0017] Example 2, as Figure 1-4 As shown, a connecting plate 5 is fixed to the front end of the fan welding frame 1. The connecting plate 5 is installed with the silencer 2 by locking bolts 6. Multiple latches 7 are fixed to the top of the filter screen 4. The latches 7 are installed with the silencer 2 by bolts. A ring of mounting holes is opened at the bottom end of the fan welding frame 1. Silicone sealant is provided on the outside of the locking bolts 6.

[0018] The overall effect of Embodiment 2 is that the filter screen 4, silencer 2, centrifugal fan 3, and fan welded frame 1 are all detachable, which facilitates assembly and use in various confined environments and allows for easy replacement and maintenance. All bolts used for fastening are made of white zinc plated material, grade 8.8, and exposed bolts are sealed with silicone sealant. The overall corrosion resistance of the explosion-proof fan meets the C3 level requirements of ISO12944-2-1998, satisfying customer requirements. Air cooling is used to directly cool the generator, resulting in better cooling effect and eliminating the need for secondary cooling. The mounting holes facilitate bolt tightening and fixing to the generator. All components of this device are installed and disassembled using bolts.

[0019] Working Principle: When in use, the low-noise centrifugal explosion-proof fan's outlet flange is installed at the generator's inlet. Utilizing the centrifugal fan's blowing principle, low-temperature external air is delivered into the generator. This low-temperature air first passes through a filter screen 4 to effectively isolate impurities from the external environment, and then passes through a silencer 2 to reduce noise generated by the high-speed airflow impacting the fan's welded frame 1. Through the continuous operation of this low-noise centrifugal explosion-proof fan, the high-temperature air generated inside the wind turbine is continuously expelled by the incoming low-temperature air, achieving the purpose of cooling the generator. This ensures the generator operates in an ideal environment, guaranteeing power generation efficiency, reducing losses, and extending the generator's service life.

[0020] The wiring diagrams of the silencer 2 and centrifugal fan 3 in this utility model are common knowledge in the field. Their working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the silencer 2 and centrifugal fan 3 will not be explained in detail.

[0021] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A low noise centrifugal explosion-proof fan comprising a fan welded frame (1), characterized in that: A centrifugal fan (3) is installed at the rear end of the fan welding frame (1), and a silencer (2) is installed at the front end of the fan welding frame (1). A filter screen (4) is installed inside the silencer (2).

2. A low noise, centrifugal, explosion-proof fan as claimed in claim 1, characterized in that: The front end of the fan welding frame (1) is fixed with a connecting plate (5), and the connecting plate (5) is installed with the silencer (2) by locking bolts (6).

3. The low-noise centrifugal explosion-proof fan according to claim 1, characterized in that: The top of the filter screen (4) is fixed with multiple latches (7), which are installed with the muffler (2) by bolts.

4. The low-noise centrifugal explosion-proof fan according to claim 1, characterized in that: The bottom end of the fan welding frame (1) has a ring of mounting holes.

5. A low-noise centrifugal explosion-proof fan according to claim 2, characterized in that: The locking bolt (6) is provided with silicone sealant on the outside.

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